Mayor Daniel Lurie ran as a builder. This week the pro-housing movement that ought to be his natural base handed him a B-minus — "maybe even a C+" — while awarding New York's socialist mayor, Zohran Mamdani, an A-minus.

The grades came out of an hour-long online debate, so treat them as part theater. What sits underneath is harder: the litigation arm of that same movement has now taken San Francisco to court twice in 2026 over how it builds. The letter grade is trivia. The reason it stings is that the graders spent years fighting to make building easier and campaigning against exactly the neighborhood-veto politics Lurie inherited — and they still walked away irritated. That is a rougher review than anything his usual opponents produce.

The billing was built for clicks — a head-to-head over which mayor does housing better. Laura Foote, executive director of YIMBY Action, argued the San Francisco side; Ryder Kessler, a co-founder of Abundance New York, took the New York side; writer Scott Alan Lucas moderated. The exchange was first reported by Mission Local (external source, opens in a new tab), which described a stark split: an A-minus for Mamdani, barely seven months into the job, and a B-minus drifting toward a C+ for a mayor Foote had once hoped would become, in her words, the movement's hero.

Strip out the letter grade and Foote's actual complaints are mostly checkable. In the mayor's favor: he helped push through the city's first big rezoning in decades, and he backed a sharp reduction in the below-market share developers must include in new market-rate projects. That reduction is no small thing. In July the Board of Supervisors voted 9-2 to lower the inclusionary requirement to 5 percent from 15 percent on projects of 25 units or more — a bargain Supervisor Myrna Melgar brokered that ties the cut to an affordable-housing fund bound for the fall ballot, as Mission Local documented (external source, opens in a new tab).

Where the movement stopped grading and started filing is the other column. On Aug. 13 a coalition fronted by YIMBY Law went to San Francisco Superior Court, arguing the city had unlawfully lifted SoMa, the Bayview and the Bayshore out of SB 79, the transit-density statute from state Sen. Scott Wiener. Their target is an ordinance Lurie signed in May. The groups contend the city is recycling housing capacity it already owed under its Family Zoning Plan and relabeling it as fresh SB 79 compliance — "triple-dipping," in the phrase of YIMBY Law attorney Ryan Patterson, who spoke to The San Francisco Standard (external source, opens in a new tab). The group's executive director, Sonja Trauss, cast the exemption as a bid to block construction in a city where one-bedrooms clear $4,000 a month.

It was the second such filing of the year, a tally Foote confirmed on the livestream when she noted she is now suing the city for the second time. YIMBY Law, the courtroom affiliate of the movement she leads, sued back in February, contending the Family Zoning Plan alone won't reach the 82,000 units the state has told San Francisco to plan for by 2031. An earlier round of litigation faulted the upzoning for capping heights too low (external source, opens in a new tab) to satisfy state law. One clarification the seed coverage blurred: these suits belong to YIMBY Law, with Trauss as plaintiff-in-chief, not to Foote personally.

Lurie's team rejects the framing. Spokesperson Charles Lutvak, quoted by Mission Local, pointed to the rezoning and the Melgar ballot measure as evidence of real movement, while allowing that turning those reforms into finished homes is still unfinished work.

That admission is the entire story. The Dissent's City Hall desk reported this month that the signature state housing measure Lurie folds into his three-bill momentum pitch actually died in Sacramento in February — a stall his upbeat framing left out. A B-minus from your own flank, delivered alongside a lawsuit, isn't a stray data point. It's the same verdict his critics keep reaching — just spoken by a friend.